Air cooler



FIG. 1 is a front view of an air cooler showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines shown in the drawings represent portions of the air cooler and form no part of the claimed design. 

CLAIM I claim the ornamental design for an air cooler, as shown and described. 